PS2M_STS_ENABLE_DEV
sc->status = PS2M_STS_ENABLE_DEV;
sc->status &= ~PS2M_STS_ENABLE_DEV;
sc->status |= PS2M_STS_ENABLE_DEV;
if ((sc->status & PS2M_STS_ENABLE_DEV) == 0 || !sc->ctrlenable) {